I try not to be a customer of anyone who misuses apostrophes... but I'd starve to death if I kept very strictly to my principles. However, I am pleased to report that Marks & Spencer responded to customer demand and now have "10 items or fewer" signs!
I nearly had a fit of the vapours when I found a sign on one of the cross-trainers at my gym explaining that the machine was not working and they were sorry for the 'icovience'. It was not hand-written, so somebody was too bone idle to use a spell-checker.
What really gets me is just HOW can someone ignore that big zig-zagging red line that tells you that you are incorrect?! It boggles the mind.
I don't know, but apparently they can. It's hilarious when it's on a huge blackboard outside a grocery shop. We've seen things like:
"Lunch's from £5!"
"Two bottle's of wine for £10"
I honestly feel like asking these people, "Were you never taught how to spell and use punctuation correctly?? Then I feel like I am being pedantic...
The "their, there and they're" confusion gets on my nerves a lot as well. I see it a lot on FB ("Their was no point" or "There over their"?!), as does the your and you're. "Your getting on my nerves with you're awful spelling"). Gah.